The invention belongs to the technical field of electric vehicles, and discloses a low-voltage battery charging control system and method. The high-voltage power supply device, the high-voltage conversion device and the low-voltage battery are sequentially connected, and the vehicle control unit is in communication connection with the low-voltage battery and the high-voltage conversion device. The low-voltage battery detects the current battery state when the whole vehicle is in a high-voltage state, starts a charging mode when the current electric quantity is lower than a preset threshold value, and sends a charging request according to the current battery state; the vehicle control unit responds to the charging request and sends a voltage control instruction to the high-voltage conversion device; and the high-voltage conversion device responds to the voltage control instruction to convert the high-voltage distribution output by the high-voltage power supply device, and outputs the converted low-voltage distribution to the low-voltage battery for charging. The charging request voltage is accurately estimated according to the current battery state, so that the low-voltage battery is always in the optimal charging state, the battery charging efficiency is improved, and the influence of the whole vehicle load fluctuation on the service life of the battery is effectively avoided.

    本发明属于电动汽车技术领域,公开了一种低压电池充电控制系统及方法。具体包括:依次连接的高压供电装置、高压转换装置以及低压电池,分别与低压电池和高压转换装置通信连接的整车控制器;低压电池在整车处于上高压状态时检测当前电池状态,在当前电量低于预设阈值时开启充电模式,根据当前电池状态发出充电请求;整车控制器响应充电请求向高压转换装置发送电压控制指令;高压转换装置响应电压控制指令对高压供电装置输出的高压配电进行转换,将转换后的低压配电输出至低压电池进行充电。根据当前电池状态对充电请求电压进行精确估算,使得低压电池始终处于最佳充电状态,提升了电池充电效率,有效避免整车负载波动对电池使用寿命造成的影响。


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    Title :

    Low-voltage battery charging control system and method


    Additional title:

    低压电池充电控制系统及方法


    Contributors:
    TIAN ZHONG (author) / MA LUPING (author) / ZHANG JIAHAO (author) / HUANG JINTENG (author)

    Publication date :

    2023-01-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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